Patterngraph apparatus

Details Patterngraph apparatus Patterngraph apparatus

1984-11-23

1986-03-11

Stearns, Richard R.

Geometrical instruments

Scriber

Curved line

B43L 1100

Patent

active

045744840

ABSTRACT:
The apparatus serves to draw various geometric patterns on circular sheets of paper. Primarily, it consists of a base having a hand operated drive wheel that rotates a turntable, to which a piece of circular paper has been attached by pins sticking up from its surface. It also includes an adjustable pen holder support, which is fastened to a guide rod which is removably received, at one end, in any one of a number of grooves in a weave rack rod fastened to the base, and the other end of the guide rod is removably received in any one of several openings in a French curve arm pivotally adjustable on the drive wheel.

REFERENCES:
patent: 859366 (1907-07-01), Clark
patent: 894205 (1908-07-01), Horsman, Jr.
patent: 1307958 (1919-06-01), Chaney
patent: 1980917 (1934-11-01), Grupp

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